Lead hexanitrooxanilide

ABSTRACT

(1-((2,4,6-TRI(O2N-)PHENYL)-N-CO-CO-N-),2,4,6-TRI(O2N-)-   BENZENE).PB   A NOVEL COMPOUND, LEAD HEXANITROOXANILIDE, IS A THERMALLY STABLE, PRIMARY EXPLOSIVE EXHIBITING NO-FIRE CHARACTERISTICS SUPERIOR TO THOSE OF LEAD STYPHNATES.

LEAD HEXANITROOXANILIDE Filed Feb. 12, 1969 OZN Noz

INVENTOR. JOHN W. FRONABARG ER ATTORNEYS United States Patent 3,565,932 LEAD HEXANITROOXANILIDE John W. Fronabarger, Sun City, Ariz., assignor to UMC Industries, Inc., a corporation of Delaware Filed Feb. 12, 1969, Ser. No. 798,753 Int. Cl. C07f 7/24 US. Cl. 260-435 1 Claim ABSTRACT OF THE DISCLOSURE A novel compound, lead hexanitrooxanilide, is a ther mally stable, primary explosive exhibiting no-fire characteristics superior to those of lead styphnates.

This invention relates to explosives.

More particularly, the invention concerns a novel compound which is a thermally stable, primary explosive.

In a particular aspect, the invention concerns a thermally stable, primary explosive which exhibits no-fire charactertistics superior to those of the lead styphnates.

In forming explosive trains, it is common practice to employ a so-called primary explosive which is thermally sensitive to initiation by thermal initiators such as bridgewires, pyrotechnics, and the like. The primary explosive should deflagrate or explode rather than burn, even when unconfined. Ordinarily, a primary explosive requires a relatively low energy input for its initiation, say on the order of 100,000 ergs or less.

By contrast, a secondary explosive requires a considerably higher energy input for initiation especially in the range of one billion ergs or greater and will not produce a high order detonation when burned unless suitably confined.

Lead styphnates are commonly employed in the explosive arts as primary explosives. However, it would be 3,565,932 Patented Feb. 23, 1971 highly desirable to provide a material of improved insensitivity to ignition from extraneous energy sources.

I have now discovered a novel compound which exhibits such characteristics and which is thermally stable, i.e.. at 450 F. for at least two hurs.

My novel compound is lead hexanitrooanilide and has the structural formula shown in the drawings, according to present information.

My novel compound is lead hexanitrooxanilide and has lowing method:

On hundred g. of 2,2,4,4',6,6'-hexanitrooxanilide is added to a warm (40 C.) stirred mixture of 3750 ml. of methanol and 1250 m1. of acetone. A warm solution of g. of lead acetate trihydrate in 400 ml. methanol is added to the resulting suspension with stirring. The resulting mixture is stirred for ten minutes subsequent to the lead acetate addition and the solid product is collected on a vacuum filter. After washing the product three times with 100 ml. portions of methanol and acetone, respectively, the solid is boiled in 200 ml. of methanol on a steam bath for five minutes. The purified solid is then collected on a vacuum filter, and washed three times with 100 ml. portions of methanol. Drying at 100 C. affords a product suitable for use.

Having described my invention and the presently preferred methods of practice thereof, I claim:

1. Lead 2,2,4,4',6,6-hexanitrooxanilide.

T OBIAS E. LEVOW, Primary Examiner H. M. S. SNEED, Assistant Examiner US. Cl. X.R.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,565,932 Dated February 1971 Inventor(s) John Fronabarger It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 1 line 30 "ralatively" should read relativel Column 2 line 5 "hurs" should read hours line 6 "hexanitrooanilide" should read hexanitrooxanilide lines 9 and 10 "My novel compound is lead hexanitrooxanili and has lowing method: should read My novel compound is prepared according to the following method line 20 "2 should read 2000 Signed and sealed this 12th day of September 1972 (SEAL) Attestt ROBERT GOTTSCHALK Commissioner of Patents EDWARD M .FLETCHER ,JR Attesting Officer can 

